simplication of code
more code clean-ups and added bonferroni correction to stats output
added bonferroni correction to example output
additional clean-ups for code
added extract_per_individual_state_metadata_from_mapping_f_and_biom function and tests

this will support paired difference tests based on observations in a biom file
added wrapper function around extract_per_individual_state_metadatum_from_mapping_f

this supports getting data for multiple categories at once, and resulting objects now better match result objects from extract_per_individual_state_metadata_from_mapping_f_and_biom
updated to use new wrapper function
added script-level support for paired differences based on biom file